How long ___________ (learn / she)English before she went to London?Co...
The past perfect continuous tense (also known as the past perfect progressive tense) shows that an action that started in the past continued up until another time in the past. The past perfect continuous tense is constructed using had been + the verb's present participle (root + -ing).
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How long ___________ (learn / she)English before she went to London?Co...
Explanation:
The correct answer to the given question is "had she been learning". This answer is in the past perfect continuous tense. Let's break down the explanation into headings:
Past perfect continuous tense:
The past perfect continuous tense is used to talk about an action that started in the past and continued up until another time in the past. This tense is formed by using the past perfect of the helping verb "have" (had) followed by "been" and the present participle of the main verb (-ing form).
Usage of "had she been learning":
In the given question, we are talking about an action (learning English) that started in the past and continued up until another time in the past (before she went to London). This means that we need to use the past perfect continuous tense to describe this action.
Subject-verb agreement:
The subject of the sentence is "she", which is in the third person singular. When using the past perfect continuous tense with a third person singular subject, we need to add "had been" before the present participle of the main verb (-ing form). Therefore, the correct form of the verb "learn" in this case is "had she been learning".
Conclusion:
In conclusion, the correct answer to the given question is "had she been learning". This answer is in the past perfect continuous tense, which is used to talk about an action that started in the past and continued up until another time in the past. The subject-verb agreement requires us to add "had been" before the present participle of the main verb (-ing form) when using this tense with a third person singular subject.